DJSI
is a stock price index jointly compiled by Dow Jones & Company, Inc. in the
United States, and RobecoSAM, a research company conducting Corporate
Sustainability Assessment (CSA) in Switzerland. DJSI is used to assess the
sustainability factors of the world's major companies from Economic,
Environmental, and Social perspectives. Participation for assessment is by invitation only.

Delta believes a truly sustainable business model is based on an
ethically conducted operation with
transparency and accountability; respect for human rights and fair treatment to
all stakeholders; and delivering value add to its stakeholders not just through its product
and services but also through goodwill efforts to realize a better environment and
the well-being of the communities where the company’s facilities are located. Delta’s
mission statement, “To provide innovative, clean and
energy-efficient solutions for a better tomorrow”, reflects the company’s commitment in
sustainable development.